//
//  CountTool.m
//  CountdownButton
//
//  Created by adiljan on 16/9/2.
//  Copyright © 2016年 adiljan. All rights reserved.
//

#import "CountdownTool.h"


@implementation CountdownTool

/**
 *  倒计时
 */
+(void) Countdown:(UIButton *)btn startWithTime:(NSInteger)timeLine btnTitle:(NSString *)btnTitle{
    
    __block NSInteger timeout=timeLine; //倒计时时间
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0,queue);
    dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0); //每秒执行
    dispatch_source_set_event_handler(_timer, ^{
        if(timeout<=0){ //倒计时结束，关闭
            
            dispatch_source_cancel(_timer);
            dispatch_async(dispatch_get_main_queue(), ^{
                //设置界面的按钮显示 根据自己需求设置
                btn.backgroundColor = [UIColor orangeColor];
                
                NSString *strTitle;
                if (btnTitle ==nil || [btnTitle isEqualToString:@""]) {
                    strTitle = @"重新获取";
                }else{
                    strTitle = btnTitle;
                }
                [btn setTitle:strTitle forState:UIControlStateNormal];
                btn.userInteractionEnabled = YES;
            });
        }else{
            //            int minutes = timeout / 60;
            int seconds = timeout % 60;
            NSString *strTime = [NSString stringWithFormat:@"%.2d", seconds];
            dispatch_async(dispatch_get_main_queue(), ^{
                //设置界面的按钮显示 根据自己需求设置
                btn.backgroundColor = [UIColor colorWithRed:192.0/255.0f green:192.0/255.0f blue:192.0/255.0f alpha:1];
                [btn setTitle:[NSString stringWithFormat:@"%@",strTime] forState:UIControlStateNormal];
                btn.userInteractionEnabled = NO;
                
            });
            timeout--;
            
        }
    });
    dispatch_resume(_timer);
}

@end
